Hair brush



FIG. 1 is a perspective view of a hair brush showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is right side view thereof. 

The ornamental design for a hair brush, as shown and described. 